Drain-trap.



s. G. BROWN. DRAIN TRAP. APPLIOAfIION FILED AUG. 23, 1912.

a SHEETS-SHEET 1.

Patented Dec. 30, 1913.

S. G. BROWN.

DRAIN TRAP.

APPLICATION FILED AUG. 23, 1912.

Patented Dec. 30, 1913.

3 SHEETS-SHEET 2.

S. G. BROWN. DRAIN TRAP.

APPLI'OATION FILED AUG.23, 1912.

Patented Dec. 30, 1913.

3 SHEETSSHEET 3.

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6 I flag/1123K SIAMUED G. BROWN, F LYNN, MASSACHUSETTS.

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Specification of Letters Patent.

Patented Dec. 36, 1913.

Application filed August 23, 1912. Serial No. 716,608.

To all whom c't may concern:

Be it known that 1, SAMUEL G. BROWN, a citizen of the United States, residing at Lynn, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Drain-Traps;

and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to an improvement in drain traps and more particularly" drain traps for automobile wash stands and the like. Automobiles on the wash stand drip water, sand, oil and gasolene, and it is desirable that the gasolene, oil and sand should not be permitted to flow into the sewer, so in some instances it has been proposed to use an elaborate apparatus.

for separating the oil" from the water, and no attention, so far, has been givento preventing sand from flowing dlrectly into the sewer. a p

The object of the present invention is to produce a simple and inexpensive drain trap which will separate the water, sand, oil and gasolene, and permit only ihe water to flow into the sewer.

To the above end, the present invent-1o consists in the trap hereinafter described and particularly defined in the claims.

In the accompanying .drawings illustrating the preferred form. of the invention, Figure 1 is a sectional elevation taken on the line 11 of Fig. i; Fig. 2 is a sectional elevation on the line 2-2 of Fig. 4-; Fig. 3 is a partial sectional elevation on the line 33 of Fig. 4; and Fig. 4- is a plan of the trap' with thefloor plate removed.

The trap comprises a main body 10 having an oil well body 11 integral therewith located at one side thereof for receiving the oil bucket or pail 12. The upper edge of the main body 10 and the oil well body 11 is provided with a flange 13 extending completely around the body and adapted/co be' interlocked with the concrete iioor of the wash stand.

The trap is covered with a floor plate 1 1 provided with a number of holes 15 in the depression 16 for the entrance of the drip-v pings from the machine, to wit, water, sand, oil and gasolene. The floor plate 14: is removable, beingloosely received in the top of the mainbody 10. The water, sand, oil

and gasolene flowing into the trap through the holes in the floor plate 14 are received in the bafiie basin 17.having a floor 18 which is inclined toward a central opening 19 therein, through which such materials are discharged into the oil separator 20.

The hole 19 is surrounded by a depending flange 21 forming a discharge pipe extending down into the oil separator 20. The bafile basin 17- is supported in the main body of the trap upon the shoulder 22 thereof.

This oil separator 20 is supported from the lower side of the bafie basin 1'? and extends down into the sandbucket 23. The sand bucket is open at its top and the water flows down through the oil separator 20 out through the opening 24 at the bottom thereof into the sand bucket and thence rises and, flows over the lip of the sand bucket and falls into the trap body 10.

At the bottom of the trap body the water outlet 25 is provided which discharges through the sewer pipe 26, such sewer pipe running upwarda ways before it discharges into the sewer proper to maintain a constant seal in the sewer pipe so asto prevent any flow of gases from the sewer pipe into \the trap. The oil-which falls into the oil separator remains floating on the water contained therein and gradually accumulates until it rises to the level of the mouth of the oil spout 27. The amount of oil, therefore, in the oil separator when the oil is flowing away therefrom, extends from the level 28 to the level 29, the former level being the level of the mouth of the oil spout and the latter level being the level of the water upon which the oil floats in the oil separater. The mouth of the oil spout is flat and level and the oil flows oil of the top of the body of oil in the oil separator 20 through the oil chute 27 and is discharged into the oil bucket or pail 12. It is to be understood, of course, that at this time the water in the sand bucket 23 is overflowing the lip of the bucket and therefore has a level 30 on the outside of the oil separator '20, the difference in specific gravity of the oil and the water causing the oil to float at a higher level inside of the oil separator from that at which the water is maintained on the outside thereof. In this way, it will be seen that the mixedoil and water flowing into the oil separator is separated there, thr small globules of oil having time to coalesce and to unite into a solid body of oil before .sand bucket.

it reaches the level of the mouth of the oil chute 27, and that the Water which enters the oil separator flows down through the bottom of the oil separator into the sand bucket. No sand remains in the oil separator 20 as it flows out into the sand bucketwith the water, but here the sand is caught in the sand bucket while the water flows on over the top of the sand bucket and falls into the trap body. The gasolene which enters the oil separator with the oil, water and sand, is removed from the trap by a process of evaporation.

The trap body is provided at opposite sides, as seen in Fig. 3, with air pipe connections 31 and 32. These air openings register with holes 33 and 34 formed in the baflie basin 17 underneath the inclined floor 18 thereof. One of the air openings 31, for example, will be connected with an air inlet drawn from any convenient location, and the other air opening 32 will be piped through the building for a distance and discharged at a higher level than the entrance of the air through the opening 31, so that a current of air will be induced to flow through the trap body entering through the hole 33 and discharging through .the hole 34, thereby operating to evaporate any gasolene which may be present in the oil separator. The lower end of the pipe 21 depending from the floor 18 of the battle basin dips below the surface of the oil contained in the oil separator 20, and some gasolene may remain in this pipe 21, butthe exposed surface of such gasolene is small, and any gasolene vaporized therefrom is of such insignificant amount as to be entirely without any danger. Of course, the oil, water and gasolene flowing down through the hole 19 is more'or less mixed together, and it has been found that a large part of the gaso lene contained is carried by the mixture down below the lower end of the pipe 21, so that it is discharged into the oil separator 20 and rises to the surface of the oil standing around the pipe 21. The oil well 11 is covered with a screw cap35 to prevent the escape of any gasolene vapors from the trap.

The sand bucket 23 is so supported that when the weight of the sand contained therein amounts to a certain predetermined quane tity, requiring it to be emptied, the bucket will operate to close the opening in the lower end of the pipe 21, thereby causing the further ingress of water into the trap to be stopped and causing the trap to overflow onthe floor of the wash stand. This is the signal by which the trap indicates that it is in condition requiring the emptying of the 0f course, the floor plate 14 is not fitted tightly in the flange 13 in the trap body, but in the use of the paratus the sand and materials flowing into the crevice between the floor plate and the flange wash stand.

The arrangement for supporting the sand bucket in such manner as to cause it to close the lower end of the pipe 21 is as follows: The sand bucket 23 is provided with cars 36 to which are pivotally attached links 37 slotted at 38 to receive the ends of the levers 39 pivoted at 40 on the fulcrums 41. To the upper ends of the links 37 are attached the rings 42. The inner ends 43 of the levers 39 engage the under side of the head 44 secured to the upper end of the sleeve 45 which supports upon its lower end the counter-weight 46. The above described arrangement is such that when an amount of sand collects in the sand bucket 23 sulficient to overbalance the weight 46, thereupon the weight is lifted and the upper surface of the weight, acting as a valve, closes the mouth of the pipe 21 and prevents the further ingress of material into the trap, causing it to flood, as above described. Thereupon the fioor plate 14 is removed, and by taking hold of the rings 42 the links 37 are transferred from the ends of the levers 39 to the hooks 47 projecting inwardly from the side walls of the body of the trap, thus supporting the sand'bucket on these hooks 47. Then the T head 48 mbunted upon the upper end of the rod 49 which passes vertically through the sleeve 45 and carries at its lower end the valve 50 is pulled upward, thereby lifting the valve 50 and drawing it into the mouth of the oil separator, thereby closing the mouth of such separator, and by further lifting upon the handle the battle basin and oil separator are lifted entirely out of the trap body, maintaining the oil and water inthe oil separator by the pressure of the valve 50 against the mouth in the lower end of the oil separator 20. These parts may then be stood upon the floor, the pressure of the weight of the parts upon the valve 50 holding such valve closed. Then the sand bucketmay be lifted out of the trap body and emptied of its accumulated sand. At the same time, the closure 35'Wlll be taken out and the oil bucket 12 will be lifted out and emptied, re turned to the oil well, the closure 35 again put in place, after which the sand bucket 23, having been returnedto the trap 20, the baflie basin and oil separator will be returned .to their positions in the trap body, lifting it up by the handle 48 as before, and dropping it down into the trap body. Then the straps 37 will be transferred from the hooks 47 to the ends of the levers 39, the-floor plate 14 will be returned to its place and the trap will be ready for further use. It is to be observed in this connection that the water underneath the oil in the oil separator flows out into the sand bucket when the bafie basin and oil separator are returned to the trap body and that the water is suificient in quantity to cover the mouth 24 of theoil separator so that no oil enters the sand bucket,

The outer ends of the lever 39 project through the walls 51 of the rentrant chambers formed in the side walls of the bafie basin (see Fig. 4 for plan, Fig. 2 for section, and Fig. 3 for elevation showing these reentrant chambers). The upper surface of this wall 51 engages the under side of the floor plate 14 so as to prevent water from overflowing the Walls 15 and thereby continuing to permit the escape of water from the trap, although it shall have reached a condition requiring its being emptied.

The operation of the trap has been set forth in connection with\the description of the various parts during their description, but it may perhaps be convenient, to recapitulate here, observing that the trap is so constructed that when an accumulation of a certain amount of sand has taken place, the sand bucket becomes so heavy that it overbalances the counter-weight and closes the entrance opening, preventing the fur-' ther ingress of material to the trap, thereupon the trap, in continued use, will overflow on the floor of the wash stand and dicates that the sand bucket should be emptied. -Furthermore, that any gasolene which is carried into the trap with the water, oil and sand, will be evaporated and carried out of doors, where it will be dissipated without danger. Again, that when it is desired to empty the trap, only the simplest operations are required of taking up the floor plate, transferring the sand bucket support from the counter-weight levers to the stationary hooks and thereupon lifting out all of the unseparated oil without permitting it to be spilled into the sewer or otherwise lost, and that after the emptying of the sand bucket, it may be returned still without any possibility of loss of the oil. In fact, it will be observed that if the valve 50 does not fit the opening 24 in the bottom of the oil separator tightly, the leakage will be water fora considerable length of time without any escape of the oil which is floating on top of the water in the separator. Furthermore, that any gasolene that may be floating upon the water at this time will not be spilled into the sewer or permitted to escape but held in place and finally restored to the trap to be evaporated as before. Again, it isto be observed that the water running through the trap is permitted to run over the lip of the sand bucket at a considerable height above the water level standing in the trap body, so that a constant level of water is maintained up to the-time when an accumulation of sand in the bucket is sufieient to overbalance the countenpiece 4E6, whereupon, when the sand bucket drops, such fall results in the lowering of the oil level in the oil separator, so that when the latter is lifted out of the trap body, there is no liability of spilling oil therefrom,

This trap efiiciently separates the four materials flowing into it from each other without in any way interfering with the efiiciency of the operation of any one of the contrivances, thus the flow of sand through the oil separator has not the slightest efiect upon its operation, because the separation of the oil and water-is entirely due to the variation of levels of outlets which efliciently secures the separation irrespective of the flow of sand through the device. Furthermore, that the oil flowing out of the oil spout is entirely free from water because it has had a suflicient length of time to stand in the receptacle to gather into a continuous massof oil, so that no water will be carried over from the oil separator into the oil bucket. Furthermore, it will be observed that wholly irrespective of what the specific gravities of the oil flowing into the trap may be, they will automatically operate to separate themselves from the water, when the specific gravityof the oil is less, by decreasing the depth of the oil, and when it is greater, by increasing the depth of the oil, the overflow level always remaining constant, but the level 29 varying with the differences in the specific gravities of the oil apd the amount of ga'solene lying on top 0 it.

While the specific embodiment of the invention is particularly adapted for use as a drain trap for automobile wash stands, it is to be understood that the invention is not limited to such use as it may be used for other purposes within the purview of the claims.

Having thus described the inyention, what is claimed is 1. A drain trap havin in combination, a trap body, a cover or oor plate, a baffle basin locatedin the upper part of the trap body provided with a depending oil separator, a sand bucket located in the trap body surrounding the depending oil separator, the said balile basin having an opening discharging into the oil separator, a counter-weight for the sandbucket, connections between the counter-weight and the sand bucket and a valve for closing the opening from the bafile basin into the oil separator connected with the sand bucket and operating upon the accumulation of sand therein to close such opening to cause the trap to overflow, substantially as described.

2. An automobile washstand drain trap for receiving gasolene and water, retaining the gasolene and discharging the water into a sewer pipe having, in combination, a"

chamber in which e gasolene and water are separated by flotation, sald chamber having an inlet for receiving the gasolene washstand and an outlet for discharging the" water to the sewer pipe having a liquid seal for preventing the escape of gasolene vapor into the sewer pipe, and an air inlet pipe for admitting and discharging a continuous circulation of air through said chamber and over the surface of the gasolene retained therein for vaporizing and carrying the gasolene away through the air outlet pipe, substantially as described.

3. A drain trap having, in combination, a sand bucket, an inlet for directing water mixed with sand into the sand bucket extending into the sand bucket and below the normal liquid level therein, and a valve for closing the mouth of the inlet to retain the water contained in the inlet so that it, with its contained liquid, may be removed from the sand bucket and allow the sand bucket to be emptied, substantially as described.

4. A drain trap having, in combination, a trap body, a sand bucket, an oil bucket, an oil separator located in the sand bucket, connections for directing the materials entering the trap into the oil separator, an oil connection from the oil separator to the oil bucket, and a water connection from the oil separator to the sand bucket; said oil separator operating to separate the oil and discharge it through the oil connection into the oil bucket and allow the water to flow through the water connection into the sand bucket, said sand bucket operating to catch sand and the like and allow the water to. flow from the sand bucket into the trap, substantially as described. 7

5. A drain trap having, in combination, a trap body, a sand bucket for catching sediment passing into the trap and means for emptying the sand bucket of the accumulated sediment, an oil separator located in the sand bucket for separating oil and the like from the water passing through the trap, and connections for leading the water through the oil separator and sand bucket to the trap outlet, substantially as described.

6. A drain trap having, in combination, a trap body, a sand bucket contained therein, counterbalancing means for the sand bucket which is overbalanced by the sand bucket upon a sufiicient accumulation of sand therein, a valve controlling the passage of liquid through the trap, and means connected to the-sand bucket for closing the valve when the sand bucket overbalances its counterbalanoing means to cause the trap to overflow, substantially as described.

as 7. A drain trap having, in combination, a

trap body, an \oil separator located therein, a water chamber, a connection between the bottom of the oil separator and the water chamber, a valve for closing said connection, a water outlet for the water chamber located at the normal water line therein, an oil outlet for'the 1 oil separator located above the level of the Water outlet, and means for closing the valve at the bottom of the oil separator when it is desired to remove the oil separator from the trap, substantially as described.

8. A drain trap having, in combination, a sand separator for catching sediment and the like from wash water passing into the trap and means for emptying the trap of the accumulated sediment, an oil separator for separating the oil and the like from the Wash water, and connections for leading the wash water through said separators and for discharging from the trap the water from which the oil and sand have been separated, substantially as described.

9; A drain trap having, in combination, a trap body, a bucket, a counterbalance for the bucket including a counterweight which is overbalanced when the bucket exceeds a certain predetermined amount in weight, an opening for the admission of materials to the trap, a valve for closing such opening, and means connected to the counterbalance and operated thereby for closing the valve when thebucket exceeds a certain predetermined weight, so that an attempt to continue the use of the trap will cause it to overflow and indicate that attention is required, substantially as described.

10. A drain trap having, in combination, a

trap body, a sand receptacle, means for supporting the sand receptacle having provision for allowing the sand receptacle to move downwardly under the influence of gravity when suflicient sand has accumulated in the sand receptacle, and means operating upon the downward movement of the sand receptacle for preventing further use of the trap until the sand receptacle is emptied, substantially as described.

11. A drain trap having, in combination, a trap body, a sand receptacle, means for supporting the sand receptacle having provision for allowing the sand receptacle to move downwardly under the influence of gravity when suficient sand has accumulated in the sand receptacle, and means operating upon rator to the oil bucket, and-a water oonnec-- tion from the oil separator to the sand I bucket, said oil se arator operating to sepaing a removable oil bucket which can be 1ifted out of the trap and emptied, and means for separating sand and the like fromthe water and collecting it .includin a removable sand bucket which can be li ed out of the trap and emptied, substantially as described.

14. A drain trap for washstands having, in combination-{a tra body set beneath the floor of the washstan with a perforated to at the floor level, meansdfor separating o and the like from the water and collectin it including a removable oil bucket provided with a handle which can be grasped to lift the oil bucket out ofthe trap,- and means for separating sand and the like from the water and collecting itincluding' a removable sand bucket having a handle which can be grasped to lift the sand bucket out of the trap, said trap body having provision for opening its top for the removal of the oil and sand buckets, substantially as described.

15. An automobile washstand drain trap for receiving gasolene and water, retaining the gasolene and discharging the water into a sewer' pipe having, in combination, a chamber in which the gasolene and water are separated'by flotation, said chamber having an inlet for receiving the gasolene and water from the washstand provided with means for preventing the esca e of gasolene vapor from the chamber to t e washstand and an outlet for discharging the water into the sewer pipe provided with means for preventing the escape of gasolene vapor into the sewer ipe, and a safety air pipe connection for e escape of the evaporated gasolene from the chamber, substantially as described.

I Q G. BROWN.

Witnesses? i HORACE VAN EvnRnN, Amen AcKRoYn. 

